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    <title>Document</title>
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    <script>
        var name = "w";
        function show(a, b) {
            console.log(a + b);
            console.log(this.name);
        }
        var zhang = {
            name: "张"
        }
        show.call(zhang, 1, 2);
        show.apply(zhang, [2, 3]);
    </script>
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